I will signup now but i was wondering something. I don't use private torrent sites I use like kat or piratebay. So what advantages do I have over these by using torrents ?
In reality not much. Maybe more hassle.
In theory, it should be difficult to reach private trackers (and if it's difficult for you, it is for feds too) and at join you agree to an eula that makes you 'pirate' too. But this is only theory....
The actual difference is the size. Feds will - for now - target the big free trackers because they'll check much more people and will also scare off more.